An auxiliary device for knee joint effusion extraction in orthopedics

Abstract

The present invention belongs to the field of extraction devices, and specifically relates to an auxiliary knee joint effusion extraction device for orthopedics, which includes a fixing plate. A circular hole is formed in the middle of the fixing plate, and a syringe barrel and a needle penetrate through the circular hole. A pressing mechanism is arranged at the rear end of the fixing plate, and the pressing mechanism is used to automatically press the patient's knee joint during the process of extracting effusion. Clamping mechanisms are arranged on the left and right sides and the top of the needle, and the clamping mechanisms are used to clamp and fix the needle during the process of extracting effusion. A support assembly is arranged at the bottom end of the syringe barrel, and the support assembly is used to support and fix the syringe barrel; through the structural design of the pressing mechanism, while the medical staff keeps the syringe in the extraction state, the two pressing plates will approach each other to achieve the purpose of pressing, so as to automatically press the patient's knee joint during the process of extracting effusion, making the extraction process more convenient.

Description

Technical Field

[0001] The present invention relates to the field of extraction devices, and specifically to an auxiliary knee joint effusion extraction device for orthopedics. Background Art

[0002] Under normal circumstances, the amount of synovial fluid in the human knee joint is small and will continuously circulate and update to be in a dynamic balance state. However, once this balance is broken, joint effusion will form, causing joint swelling and discomfort. When there is more effusion, medical staff will use a syringe to extract the excess joint effusion.

[0003] An auxiliary knee joint effusion extraction device for orthopedics proposed according to the patent document CN202210303421.6. The present invention provides an auxiliary knee joint effusion extraction device for orthopedics that can fix the patient's legs and does not affect the staff's extraction operation. The present invention provides such an auxiliary knee joint effusion extraction device for orthopedics, including: a base, with first sliders symmetrically arranged in the front and back in the right part of the base; a seat, with a seat for the patient to sit between the two first sliders; a support base, with a support base arranged in the left part of the base. Under the action of the first arc-shaped plate, the lower leg of the patient is limited. The pressing block slides downward and drives the second arc-shaped plate to move downward through the first connecting rod and the third guide rod to contact the patient's thigh, thereby realizing the limitation of the patient's thigh, and avoiding the inconvenience caused to the staff by the patient moving their legs due to pain during the process of the effusion extraction device.

[0004] However, in the above-mentioned knee joint effusion extraction device, during the process of medical staff using a syringe for extraction, in order to facilitate the smooth extraction of joint effusion, the medical staff will press the swollen part of the patient's knee joint in the direction of the syringe while extracting. Since the medical staff still needs to support the syringe and keep the syringe in the extraction state during the pressing process, the operation process will be relatively inconvenient and it is easy to have the situation of effusion residue; therefore, an auxiliary knee joint effusion extraction device for orthopedics is proposed for the above problems. Summary of the Invention

[0005] In order to solve the problem that in the above-mentioned knee joint effusion extraction device, during the process of medical staff using a syringe for extraction, in order to facilitate the smooth extraction of joint effusion, the medical staff will press the swollen part of the patient's knee joint in the direction of the syringe while extracting. Since the medical staff still needs to support the syringe and keep the syringe in the extraction state during the pressing process, the operation process will be relatively inconvenient and it is easy to have the situation of effusion residue, the present invention proposes an auxiliary knee joint effusion extraction device for orthopedics.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: An auxiliary knee joint effusion extraction device for orthopedics according to the present invention includes a fixing plate. A circular hole is provided in the middle of the fixing plate, and a syringe barrel and a needle penetrate through the circular hole. A pressing mechanism is arranged at the rear end of the fixing plate, and the pressing mechanism is used to automatically press the patient's knee joint during the process of extracting effusion. Clamping mechanisms are arranged on the left and right sides and the top of the needle, and the clamping mechanisms are used to clamp and fix the needle during the process of extracting effusion. A support assembly is arranged at the bottom end of the syringe barrel, and the support assembly is used to support and fix the syringe barrel. The pressing mechanism includes two pressing plates. The front end of the pressing plate is fixedly connected to a special-shaped rod, and the front end of the special-shaped rod is fixedly connected to a slider. The slider is slidably connected inside a through groove. The through groove penetrates the fixing plate. A mounting rod is fixedly connected to the inner wall of the through groove, and the mounting rod penetrates the slider. The front end of the slider is fixedly connected to a T-shaped block, and the T-shaped block is slidably connected inside a guiding groove. The guiding groove is opened on a rotating disk. The rear end of the rotating disk is fixedly connected to a rotating block, and the rotating block is rotatably connected to the fixing plate. A transmission mechanism is arranged at the bottom end of the rotating disk.

[0007] Preferably, the transmission mechanism includes a worm gear. The worm gear is rotatably connected to the fixing plate, and the worm gear meshes with a part of the bottom end of the rotating disk. The bottom end of the worm gear meshes with a worm. The worm is sleeved in the middle of a rotating shaft. A plurality of cage sets are sleeved on the left and right sides of the rotating shaft, and the cage sets are fixedly connected to the fixing plate. Gears are fixedly connected to the left and right sides of the rotating shaft. The side of the gear away from the rotating shaft is rotatably connected to the inner wall of a fixed shell. The fixed shell is fixedly connected to the fixing plate. The gear meshes with a rack. The top end of the rack is fixedly connected to a sliding rod. The sliding rod and the rack are both slidably connected in a sliding groove. The sliding groove is opened on the front end of the fixing plate. The front end of the sliding rod is rotatably connected to a connecting rod. The front end of the connecting rod is rotatably connected to a moving frame. The rear end of the moving frame abuts against the piston inside the syringe barrel. A trapezoidal block is fixedly connected to the moving frame, and the trapezoidal block is slidably connected to a trapezoidal groove. The trapezoidal groove is opened on a fixed rod. The rear end of the fixed rod is fixedly connected to a protective shell. The protective shell is fixedly connected to the fixing plate. The protective shell is sleeved on the outside of the rotating disk.

[0008] Preferably, the clamping mechanism includes three groups of clamping blocks. All the clamping blocks are in contact with the needle. The clamping blocks are located on the left and right sides of the syringe barrel and at the top of the syringe barrel. The two side clamping blocks are fixedly connected with insertion rods. The insertion rods are inserted into the interior of the insertion columns. The insertion columns are fixedly connected with sliders. The insertion rods are fixedly connected with second springs. The second springs are inserted into the interior of the insertion columns and are fixedly connected with the inner walls of the insertion columns. The top clamping block is fixedly connected with a sliding frame. The top of the sliding frame is fixedly connected with a first spring. The first spring is in a stretched state. The top of the first spring is fixedly connected with a fixed block. The fixed block is fixedly connected to the fixed plate. The bottom of the fixed block is fixedly connected with two guide columns. The guide columns are inserted into the interior of the sliding frame. The left and right sides of the top of the sliding frame are both in contact with the tops of the top blocks. The bottom of the top block is fixedly connected to the slider.

[0009] Preferably, the support assembly includes a support block. The top of the support block is designed to be semi-circular. The top of the support block is in contact with the bottom of the syringe barrel. The bottom of the support block is inserted into the interior of the fixed seat. The fixed seat is fixedly connected to the fixed plate. The bottom of the support block is fixedly connected with two third springs. The bottoms of the third springs are fixedly connected with the inner walls of the fixed seat. The front of the support block is fixedly connected with a clamping groove, which is engaged with the front of the syringe barrel.

[0010] Preferably, the rear end of the fixed plate is fixedly connected with two side plates and a bottom plate. The two side plates are located on the left and right sides of the bottom plate. The side plates and the bottom plate are close to the bottom end of the fixed plate. The rear ends of the side plates and the bottom plate are both provided with inclined surfaces. The top of the bottom plate is fixedly connected with two mounting columns. The interior of the mounting columns is inserted with lifting columns. Multiple pin holes are provided on both the mounting columns and the lifting columns. A pin is inserted into the interior of a group of pin holes. The top of the lifting column is fixedly connected with a support plate. The top of the support plate is designed to be arc-shaped.

[0011] Preferably, the front end of the rotating disk is fixedly connected with two limit columns. One of the limit columns is in contact with the limit block. There are two limit blocks. The limit blocks are fixedly connected to the inner wall of the protective shell. The limit blocks are designed to be semi-circular.

[0012] Preferably, a long rod passes through the middle parts of both the sliding rod and the rack. The top and bottom ends of the long rod are respectively fixedly connected with the inner wall of the sliding groove and the extension column. The extension column is fixedly connected to the bottom end of the fixed plate. A return spring is sleeved on the top part of the long rod. The return spring is in a compressed state. The top and bottom ends of the return spring are respectively fixedly connected with the inner wall of the sliding groove and the top end of the sliding rod.

[0013] Preferably, three guiding wheels are fixedly connected to the inner wall of the protective shell. The three guiding wheels are respectively located on both sides and at the top of the rotating disk, and the guiding wheels are in contact with the side edges of the rotating disk.

[0014] Preferably, two mounting blocks are fixedly connected to the rear end of the fixing plate. The mounting blocks are located at the bottom end of the fixing plate, and extension blocks are fixedly connected to the bottom ends of the mounting blocks. Bolts are threadedly connected to the mounting blocks and the extension blocks.

[0015] Preferably, a sponge pad is fixedly connected to the bottom end of the pressing plate, and both the pressing plate and the sponge pad are designed in an arc shape.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. Through the structural design of the pressing mechanism of the present invention, while the medical staff keeps the syringe in the extraction state, the two pressing plates will approach each other to achieve the purpose of pressing, so as to automatically press the patient's knee joint during the extraction of the effusion, making the extraction process more convenient. It solves the problem of the existing knee joint effusion auxiliary extraction device. During the extraction process using a syringe by the medical staff, in order to facilitate the smooth extraction of the joint effusion, while extracting, the medical staff will press the swollen part of the patient's knee joint towards the syringe. Since the medical staff still needs to hold the syringe and keep the syringe in the extraction state during the pressing process, the operation process will be relatively inconvenient and it is easy to have the situation of residual effusion.

[0018] 2. Through the structural design of the clamping mechanism of the present invention, during the process of using a syringe to extract the effusion, the function of clamping the left and right sides and directly above the needle head is realized, so as to keep the position of the needle head fixed during the extraction and avoid the situation of the needle head tilting upwards, thus eliminating the need to manually hold and fix the needle head, making the extraction process more convenient.

[0019] 3. Through the structural design of the supporting component of the present invention, during the process of using a syringe to extract the effusion, the function of providing support to the bottom end of the syringe barrel is realized, so that when pulling the piston on the syringe barrel to keep the syringe in the extraction state, there is no need to hold the syringe barrel by hand, and only need to pull the piston on the syringe barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 Schematic diagram of the structure of the rear end of the present invention;

[0023] Figure 3 Schematic diagram of the connection structure of the pallet of the present invention;

[0024] Figure 4 Schematic diagram of the structure of the clamping mechanism of the present invention;

[0025] Figure 5 Schematic diagram of the connection structure of the pressing plate of the present invention;

[0026] Figure 6 Schematic diagram of the sectional structure of the present invention;

[0027] Figure 7 Schematic diagram of the connection structure of the worm of the present invention;

[0028] Figure 8 Schematic diagram of the structure inside the protective housing of the present invention;

[0029] Figure 9 Schematic diagram of the structure of the support assembly of the present invention;

[0030] Figure 10 Schematic diagram of the connection structure of the gasket long rod of the present invention;

[0031] Figure 11 Schematic diagram of the positional structure of the rotating disk and the T-shaped block of the present invention;

[0032] Figure 12 Schematic diagram of the connection structure of the mounting rod of the present invention.

[0033] In the figure: 1, fixed plate; 20, syringe barrel; 21, needle; 22, moving frame; 23, trapezoidal block; 24, trapezoidal groove; 25, fixed rod; 26, connecting rod; 27, sliding rod; 28, sliding groove; 29, rack; 30, gear; 31, rotating shaft; 32, worm gear; 33, cage; 34, worm; 35, rotating disc; 36, guiding groove; 37, protective shell; 38, rotating block; 39, T-shaped block; 40, slider; 41, mounting rod; 42, through groove; 43, top block; 44, special-shaped rod; 45, pressing plate; 46, fixed block; 47, guiding column; 48, first spring; 49, sliding frame; 50, clamping block; 51, inserting rod; 52, inserting column; 53, second spring; 54, sponge pad; 55, supporting block; 56, clamping groove; 57, third spring; 58, fixed seat; 59, reset spring; 61, long rod; 62, extending column; 63, limiting column; 64, limiting block; 65, guiding wheel; 66, side plate; 67, bottom plate; 68, mounting column; 69, bolt; 70, lifting column; 71, supporting plate; 72, mounting block; 73, extending block; 74, fixed shell. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0035] Please refer to Figure 1 - Figure 12As shown in the figure, an auxiliary device for knee joint effusion extraction in orthopedics includes a fixing plate 1. A round hole is provided in the middle of the fixing plate 1, and a syringe barrel 20 and a needle 21 penetrate through the inside of the round hole. A pressing mechanism is arranged at the rear end of the fixing plate 1, and the pressing mechanism is used to automatically press the patient's knee joint during the process of extracting effusion. Clamping mechanisms are arranged on the left and right sides and the top of the needle 21, and the clamping mechanisms are used to clamp and fix the needle 21 during the process of extracting effusion. A support assembly is arranged at the bottom end of the syringe barrel 20, and the support assembly is used to support and fix the syringe barrel 20. The pressing mechanism includes two pressing plates 45. The front end of the pressing plate 45 is fixedly connected to a special-shaped rod 44. The front end of the special-shaped rod 44 is fixedly connected to a slider 40. The slider 40 is slidably connected inside a through groove 42. The through groove 42 penetrates the fixing plate 1. A mounting rod 41 is fixedly connected to the inner wall of the through groove 42. The mounting rod 41 penetrates the slider 40. The front end of the slider 40 is fixedly connected to a T-shaped block 39. The T-shaped block 39 is slidably connected inside a guide groove 36. The guide groove 36 is opened on a rotating disk 35. The rear end of the rotating disk 35 is fixedly connected to a rotating block 38. The rotating block 38 is rotatably connected to the fixing plate 1. A transmission mechanism is arranged at the bottom end of the rotating disk 35;

[0036] Furthermore, the transmission mechanism includes a worm gear 32. The worm gear 32 is rotatably connected to the fixing plate 1. The worm gear 32 meshes with the bottom part of the rotating disk 35. The bottom end of the worm gear 32 meshes with a worm 34. The worm 34 is sleeved in the middle of a rotating shaft 31. Multiple sets of cage 33 are sleeved on the left and right sides of the rotating shaft 31. The cage 33 is fixedly connected to the fixing plate 1. Gears 30 are fixedly connected to the left and right sides of the rotating shaft 31. The side of the gear 30 away from the rotating shaft 31 is rotatably connected to the inner wall of a fixed shell 74. The fixed shell 74 is fixedly connected to the fixing plate 1. The gear 30 meshes with a rack 29. The top end of the rack 29 is fixedly connected to a sliding rod 27. The sliding rod 27 and the rack 29 are both slidably connected in a sliding groove 28. The sliding groove 28 is opened at the front end of the fixing plate 1. The front end of the sliding rod 27 is rotatably connected to a connecting rod 26. The front end of the connecting rod 26 is rotatably connected to a moving frame 22. The rear end of the moving frame 22 abuts against the piston inside the syringe barrel 20. A trapezoidal block 23 is fixedly connected to the moving frame 22. The trapezoidal block 23 is slidably connected to a trapezoidal groove 24. The trapezoidal groove 24 is opened on a fixed rod 25. The rear end of the fixed rod 25 is fixedly connected to a protective shell 37. The protective shell 37 is fixedly connected to the fixing plate 1. The protective shell 37 is sleeved outside the rotating disk 35;

[0037] Through the structural design of the pressing mechanism, while the medical staff keeps the syringe in the extraction state, the two pressing plates 45 will approach each other to achieve the purpose of pressing, so as to automatically press the patient's knee joint during the extraction of the effusion, making the extraction process more convenient. During operation, first, the fixing plate 1 is placed on one side of the patient's leg, and it is ensured that the circular hole in the middle of the fixing plate 1 is roughly aligned with the position to be punctured. At this time, the two pressing plates 45 on the rear end of the fixing plate 1 will be located on both sides of the patient's knee joint. Then, the needle 21 is inserted into the patient's knee joint. Finally, the piston inside the syringe barrel 20 is pulled to extract the joint effusion. At this time, it is ensured that the rear end of the piston inside the syringe barrel 20 abuts against the moving frame 22, and the moving frame 22 is driven to move synchronously during the pulling process. The moving frame 22 will move forward. The moving frame 22 ensures that it can move stably in the front-back direction through the sliding of the trapezoidal block 23 in the trapezoidal groove 24. The moving frame 22 is connected to the sliding rod 27 through the connecting rod 26, so as to pull the sliding rod 27 to move inside the sliding groove 28. The sliding rod 27 is connected to the rack 29. At this time, the rack 29 will drive the gear 30 meshing with it to rotate. The rotation of the gear 30 will drive the rotation shaft 31 to rotate. The rotation shaft 31 is ensured to be stable during the rotation process through multiple sets of cage 33 sleeved on the left and right sides. A worm 34 is sleeved in the middle of the rotation shaft 31. When the worm 34 rotates, it will drive the worm gear 32 meshing with it to rotate. The worm gear 32 meshes with the bottom end part of the rotating disc 35, and then drives the rotating disc 35 to rotate. During the rotation of the rotating disc 35, the two T-shaped blocks 39 will slide in the guiding groove 36, making the T-shaped blocks 39 approach each other. The rear end of the T-shaped block 39 is connected to the slider 40. The slider 40 slides in the through groove 42, thus restricting the slider 40 to move only along the left and right sides. At this time, the special-shaped rod 44 fixed to the rear end of the slider 40 will drive the pressing plate 45 to move synchronously, and the two pressing plates 45 will gradually approach and press the patient's knee joint, so that the joint effusion can converge towards the needle 21 for convenient extraction operation. Among them, through the self-locking of the worm gear 32 and the worm 34, it can be ensured that only when the medical staff operates, the pressing plate 45 can move normally, and it is impossible to drive the pressing plate 45 to move by external force, thereby improving the safety of the pressing plate 45 when pressing the patient's knee joint, and avoiding excessive squeezing of the patient by the pressing plate 45 due to accidentally touching the pressing plate 45. The rotating disc 35 is rotationally connected to the fixing plate 1 through the rotating block 38. The cross-section of the rotating block 38 is designed in a T shape. A slot corresponding to the rotating block 38 is opened at the front end of the fixing plate 1.

[0038] Further, the clamping mechanism includes three groups of clamping blocks 50, all of the clamping blocks 50 are in contact with the needle 21, the clamping blocks 50 are located on the left and right sides of the syringe barrel 20 and the top of the syringe barrel 20, the two side clamping blocks 50 are fixedly connected with insertion rods 51, the insertion rods 51 are inserted into the interior of the insertion posts 52, the insertion posts 52 are fixedly connected with the slider 40, the insertion rods 51 are fixedly connected with the second springs 53, the second springs 53 are inserted into the interior of the insertion posts 52, the second springs 53 are fixedly connected with the inner walls of the insertion posts 52, the top clamping block 50 is fixedly connected with the sliding frame 49, the top of the sliding frame 49 is fixedly connected with a first spring 48, the first spring 48 is in a stretched state, the top of the first spring 48 is fixedly connected with the fixed block 46, the fixed block 46 is fixedly connected to the fixing plate 1, the bottom of the fixed block 46 is fixedly connected with two guide posts 47, the guide posts 47 are inserted into the interior of the sliding frame 49, the left and right sides of the top of the sliding frame 49 are both in contact with the top of the top block 43, the bottom of the top block 43 is fixedly connected to the slider 40;

[0039] Through the structural design of the clamping mechanism, the function of clamping the left and right sides and directly above the needle 21 can be achieved during the process of using the syringe to extract the effusion, so that the position of the needle 21 can be kept fixed during extraction and the situation of the needle 21 tilting upwards can be avoided, thus eliminating the need to manually support and fix the needle 21, making the extraction process more convenient. During operation, when the slider 40 slides in the through groove 42, the plug post 52 fixed on the slider 40 will gradually approach the needle 21. A second spring 53 and a plug rod 51 are inserted inside the plug post 52, and the plug rod 51 is driven to approach the needle 21 until the clamping block 50 fixed on the plug rod 51 contacts the needle 21. At this time, when the plug post 52 continues to move, the second spring 53 will be compressed, and the clamping block 50 fixed on the plug rod 51 will continue to squeeze the needle 21. The left and right sides of the needle 21 are clamped and fixed by the clamping block 50 fixed on the plug rod 51 to ensure that the position of the needle 21 will not shift. During the process of the sliders 40 approaching each other, the top block 43 fixed on the top of the slider 40 will abut against the bottom end of the sliding frame 49 and push the sliding frame 49 downward. The first spring 48 fixed on the sliding frame 49 will be gradually stretched until the clamping block 50 fixed at the bottom end of the sliding frame 49 also contacts the top end of the needle 21. The clamping block 50 fixed at the bottom end of the sliding frame 49 can prevent the needle 21 from tilting upwards during extraction. Similarly, when the sliders 40 move away from each other, the clamping block 50 can still clamp the needle 21 under the action of the second spring 53 until the second spring 53 is no longer compressed. At this time, the plug post 52 will drive the clamping block 50 away from the needle 21, and the top end of the sliding frame 49 will also move upwards under the action of the first spring 48, so that the clamping block 50 fixed at the bottom end of the sliding frame 49 no longer contacts the needle 21. Two groups of guide posts 47 are fixed at the bottom end of the fixed block 46. By inserting the guide posts 47 into the inside of the sliding frame 49, the moving direction of the sliding frame 49 is restricted to ensure that the sliding frame 49 can move stably in the vertical direction.

[0040] Further, the support assembly includes a support block 55. The top end of the support block 55 is designed to be semi-circular. The top end of the support block 55 contacts the bottom end of the syringe barrel 20. The bottom end of the support block 55 is inserted into the inside of a fixed seat 58. The fixed seat 58 is fixedly connected to the fixing plate 1. Two groups of third springs 57 are fixedly connected to the bottom end of the support block 55. The bottom ends of the third springs 57 are fixedly connected to the inner wall of the fixed seat 58. A card slot 56 is fixedly connected to the front end of the support block 55. The card slot 56 is engaged with the front end of the syringe barrel 20.

[0041] Through the structural design of the support component, the function of providing support to the bottom end of the syringe barrel 20 is realized during the process of extracting fluid with the syringe needle, so that when pulling the syringe barrel 20 to make the syringe needle in the extraction state, there is no need to hold the syringe barrel 20 by hand, and only need to pull the piston on the syringe barrel 20. During work, before inserting the needle head 21 into the patient's knee joint, by pressing down the support block 55, the third spring 57 fixed to the bottom end of the support block 55 will be compressed, and the bottom end of the support block 55 will move downward inside the fixed seat 58. At this time, the needle head 21 can be smoothly aligned with the round hole opened in the middle of the fixing plate 1. After the needle head 21 is inserted into the patient's knee joint, at this time, the support block 55 is no longer pressed, and the support block 55 will reset under the action of the third spring 57, so as to support the bottom end of the syringe barrel 20. The card slot 56 fixed to the front end of the support block 55 will also be engaged with the front end of the syringe barrel 20, so as to fix the syringe barrel 20. At this time, when performing the extraction operation, only need to pull the piston inside the syringe barrel 20.

[0042] Furthermore, two side plates 66 and one bottom plate 67 are fixedly connected to the rear end of the fixing plate 1. The two side plates 66 are located on the left and right sides of the bottom plate 67. The side plates 66 and the bottom plate 67 are close to the bottom end of the fixing plate 1. The rear ends of the side plates 66 and the bottom plate 67 are provided with inclined surfaces. Two mounting columns 68 are fixedly connected to the top end of the bottom plate 67. A lifting column 70 is inserted into the inside of the mounting column 68. Multiple pin holes are provided on the mounting column 68 and the lifting column 70. A pin 69 is inserted into the inside of one group of pin holes. The top end of the lifting column 70 is fixedly connected with a support plate 71. The top end of the support plate 71 is designed in an arc shape;

[0043] During work, the rear ends of the side plates 66 and the bottom plate 67 are provided with inclined surfaces to facilitate passing through the patient's leg smoothly. Since some patients with knee joint effusion have difficulty bending and stretching at the knee joint, or the angle that can be bent and stretched is small, at this time, the bottom end part of the patient's knee joint can be supported by the support plate 71. Two lifting columns 70 are fixed to the bottom end of the support plate 71. The pin 69 is inserted into the mounting column 68 and the lifting column 70. By pulling out the pin 69, the position height of the support plate 71 can be adjusted.

[0044] Furthermore, two limit columns 63 are fixedly connected to the front end of the rotating disk 35. One group of the limit columns 63 abuts against the limit block 64. There are two groups of the limit blocks 64. The limit blocks 64 are fixedly connected to the inner wall of the protective shell 37. The limit blocks 64 are designed in a semi-circular shape;

[0045] During operation, the limit post 63 is fixed on the rotating disk 35, and the limit block 64 is fixed on the inner wall of the protective housing 37. When the rotating disk 35 rotates to the maximum angle, the limit post 63 will abut against one set of limit blocks 64, thereby preventing wear caused by excessive extrusion between the T-shaped block 39 and the guide groove 36 and between the inner wall of the through groove 42 and the slider 40 due to the continuous rotation of the rotating disk 35.

[0046] Further, a long rod 61 passes through the middle parts of the sliding rod 27 and the rack 29. The top and bottom ends of the long rod 61 are respectively fixedly connected to the inner wall of the sliding groove 28 and the extension post 62. The extension post 62 is fixedly connected to the bottom end of the fixed plate 1. A return spring 59 is sleeved on the top part of the long rod 61. The return spring 59 is in a compressed state. The top and bottom ends of the return spring 59 are respectively fixedly connected to the inner wall of the sliding groove 28 and the top end of the sliding rod 27.

[0047] During operation, the long rod 61 passes through the sliding rod 27 and the rack 29 to facilitate guiding the movement of the sliding rod 27 and the rack 29. A return spring 59 is sleeved on the top end of the long rod 61. When the sliding rod 27 moves upward, the return spring 59 will be compressed, so that when the moving frame 22 is not pulled, the moving frame 22 can move back to its original position under the action of the return spring 59. The extension post 62 is fixed to the bottom end of the fixed plate 1 to support the bottom ends of the long rod 61 and the rack 29 and prevent the rack 29 from disengaging from the gear 30.

[0048] Further, three guide wheels 65 are fixedly connected to the inner wall of the protective housing 37. The three guide wheels 65 are respectively located on both sides and the top of the rotating disk 35. The guide wheels 65 are in contact with the side of the rotating disk 35.

[0049] During operation, the three guide wheels 65 are in contact with the rotating disk 35 to facilitate supporting the side of the rotating disk 35 during the rotation of the rotating disk 35, making the rotation of the rotating disk 35 more stable and not prone to shaking. Embodiment 2

[0050] Please refer to Figure 4 and Figure 12 As shown, as another implementation manner of the present invention compared with Embodiment 1, two mounting blocks 72 are fixedly connected to the rear end of the fixed plate 1. The mounting blocks 72 are located at the bottom end of the fixed plate 1. An extension block 73 is fixedly connected to the bottom end of the mounting block 72. Bolts are threadedly connected to the mounting blocks 72 and the extension block 73.

[0051] During operation, since most patients lie flat on the hospital bed during the process of aspirating knee joint effusion, after the fixing plate 1 is close to the patient's knee joint, the bolts on the mounting block 72 can be continuously rotated to fix the bottom end of the fixing plate 1 to the bottom end of the hospital bed, thus facilitating the fixation of the fixing plate 1. An extension block 73 is fixed to the bottom end of the mounting block 72, and the extension block 73 is used to extend the threaded connection length between the mounting block 72 and the bolt, so that the fixing effect of the bolt is better.

[0052] A sponge pad 54 is fixedly connected to the bottom end of the pressing plate 45, and both the pressing plate 45 and the sponge pad 54 are designed in an arc shape;

[0053] During operation, the sponge pad 54 can reduce the discomfort caused by the pressing plate 45 to the patient during the pressing process of the pressing plate 45, and both the pressing plate 45 and the sponge pad 54 are designed in an arc shape to better fit the patient's knee joint.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. An auxiliary knee joint effusion extraction device for orthopedics, comprising a fixing plate (1). A round hole is formed in the middle of the fixing plate (1), and a syringe barrel (20) and a needle head (21) penetrate through the inside of the round hole. It is characterized in that: A pressing mechanism is provided at the rear end of the fixed plate (1). The pressing mechanism is used to automatically press the patient's knee joint during the process of extracting fluid. Clamping mechanisms are provided on the left and right sides and the top end of the needle (21). The clamping mechanisms are used to clamp and fix the needle (21) during the process of extracting fluid. A support assembly is provided at the bottom end of the syringe barrel (20). The support assembly is used to support and fix the syringe barrel (20). The pressing mechanism includes two pressing plates (45). The front end of the pressing plate (45) is fixedly connected to the special-shaped rod (44). The front end of the special-shaped rod (44) is fixedly connected to the slider (40). The slider (40) is slidably connected inside the through groove (42). The through groove (42) penetrates the fixed plate (1). The inner wall of the through groove (42) is fixedly connected to the mounting rod (41). The mounting rod (41) penetrates the slider (40). The front end of the slider (40) is fixedly connected to the T-shaped block (39). The T-shaped block (39) is slidably connected inside the guiding groove (36). The guiding groove (36) is opened on the rotating disk (35). The rear end of the rotating disk (35) is fixedly connected to the rotating block (38). The rotating block (38) is rotatably connected to the fixed plate (1). A transmission mechanism is provided at the bottom end of the rotating disk (35).

2. The knee joint effusion assisted extraction device for orthopedics according to claim 1, characterized in that: The transmission mechanism includes a worm gear (32). The worm gear (32) is rotatably connected to the fixed plate (1). The worm gear (32) meshes with the bottom part of the rotating disk (35). The bottom end of the worm gear (32) meshes with the worm (34). The worm (34) is sleeved in the middle of the rotating shaft (31). Multiple sets of cage (33) are sleeved on the left and right sides of the rotating shaft (31). The cage (33) is fixedly connected to the fixed plate (1). Gears (30) are fixedly connected to the left and right sides of the rotating shaft (31). The side of the gear (30) away from the rotating shaft (31) is rotatably connected to the inner wall of the fixed shell (74). The fixed shell (74) is fixedly connected to the fixed plate (1). The gear (30) meshes with the rack (29). The top end of the rack (29) is fixedly connected to the sliding rod (27). The sliding rod (27) and the rack (29) are both slidably connected in the sliding groove (28). The sliding groove (28) is opened at the front end of the fixed plate (1). The front end of the sliding rod (27) is rotatably connected to the connecting rod (26). The front end of the connecting rod (26) is rotatably connected to the moving frame (22). The rear end of the moving frame (22) abuts against the piston inside the syringe barrel (20). A trapezoidal block (23) is fixedly connected to the moving frame (22). The trapezoidal block (23) is slidably connected to the trapezoidal groove (24). The trapezoidal groove (24) is opened on the fixed rod (25). The rear end of the fixed rod (25) is fixedly connected to the protective shell (37). The protective shell (37) is fixedly connected to the fixed plate (1). The protective shell (37) is sleeved outside the rotating disk (35).

3. An auxiliary knee joint effusion extraction device for orthopedics according to claim 1, characterized in that: The clamping mechanism includes three groups of clamping blocks (50), all of the clamping blocks (50) are in contact with the needle head (21). The clamping blocks (50) are located on the left and right sides of the syringe barrel (20) and at the top of the syringe barrel (20). The two side clamping blocks (50) are fixedly connected with inserting rods (51). The inserting rods (51) are inserted into the interior of inserting columns (52). The inserting columns (52) are fixedly connected with sliders (40). The inserting rods (51) are fixedly connected with second springs (53). The second springs (53) are inserted into the interior of the inserting columns (52). The second springs (53) are fixedly connected with the inner walls of the inserting columns (52). The top clamping block (50) is fixedly connected with a sliding frame (49). The top of the sliding frame (49) is fixedly connected with a first spring (48). The first spring (48) is in a stretched state. The top of the first spring (48) is fixedly connected with a fixed block (46). The fixed block (46) is fixedly connected to the fixed plate (1). The bottom of the fixed block (46) is fixedly connected with two groups of guiding columns (47). The guiding columns (47) are inserted into the interior of the sliding frame (49). The left and right sides of the top of the sliding frame (49) are both in contact with the top of a top block (43). The bottom of the top block (43) is fixedly connected to the slider (40).

4. The knee joint effusion auxiliary extraction device for orthopedics according to claim 1, characterized in that: The supporting assembly includes a supporting block (55). The top of the supporting block (55) is designed to be semi-circular. The top of the supporting block (55) is in contact with the bottom of the syringe barrel (20). The bottom of the supporting block (55) is inserted into the interior of a fixed seat (58). The fixed seat (58) is fixedly connected to the fixed plate (1). The bottom of the supporting block (55) is fixedly connected with two groups of third springs (57). The bottoms of the third springs (57) are fixedly connected with the inner walls of the fixed seat (58). The front end of the supporting block (55) is fixedly connected with a clamping groove (56). The clamping groove (56) is engaged with the front end of the syringe barrel (20).

5. An auxiliary knee joint effusion extraction device for orthopedics according to claim 4, characterized in that: Two groups of side plates (66) and a bottom plate (67) are fixedly connected to the rear end of the fixed plate (1). The two side plates (66) are located on the left and right sides of the bottom plate (67). The side plates (66) and the bottom plate (67) are close to the bottom end of the fixed plate (1). The rear ends of the side plates (66) and the bottom plate (67) are both provided with inclined surfaces. Two groups of mounting columns (68) are fixedly connected to the top of the bottom plate (67). A lifting column (70) is inserted into the interior of the mounting column (68). Multiple groups of pin holes are provided on both the mounting column (68) and the lifting column (70). A pin (69) is inserted into the interior of a group of pin holes. The top of the lifting column (70) is fixedly connected with a support plate (71). The top of the support plate (71) is designed to be arc-shaped.

6. The knee joint effusion auxiliary extraction device for orthopedics according to claim 2, wherein: Two groups of limiting columns (63) are fixedly connected to the front end of the rotating disk (35). One group of the limiting columns (63) is in contact with a limiting block (64). There are two groups of the limiting blocks (64). The limiting blocks (64) are fixedly connected to the inner wall of the protective shell (37). The limiting blocks (64) are designed to be semi-circular.

7. An orthopedic knee joint effusion assisted extraction device according to claim 2, characterized in that: A long rod (61) passes through the middle parts of the sliding rod (27) and the rack (29). The top and bottom ends of the long rod (61) are fixedly connected to the inner wall of the sliding groove (28) and the extension column (62) respectively. The extension column (62) is fixedly connected to the bottom end of the fixed plate (1). A return spring (59) is sleeved on the top part of the long rod (61). The return spring (59) is in a compressed state. The top and bottom ends of the return spring (59) are fixedly connected to the inner wall of the sliding groove (28) and the top end of the sliding rod (27) respectively.

8. An auxiliary knee joint effusion extraction device for orthopedics according to claim 6, characterized in that: Three guide wheels (65) are fixedly connected to the inner wall of the protective shell (37). The three guide wheels (65) are respectively located on both sides and the top of the rotating disc (35). The guide wheels (65) are in contact with the side of the rotating disc (35).

9. An orthopedic knee joint effusion assisted extraction device according to claim 7, characterized in that: Two mounting blocks (72) are fixedly connected to the rear end of the fixed plate (1). The mounting blocks (72) are located at the bottom end of the fixed plate (1). Extension blocks (73) are fixedly connected to the bottom ends of the mounting blocks (72). Bolts are threadedly connected to the mounting blocks (72) and the extension blocks (73).

10. The knee joint effusion auxiliary extraction device for orthopedics according to claim 1, characterized in that: A sponge pad (54) is fixedly connected to the bottom end of the pressing plate (45). Both the pressing plate (45) and the sponge pad (54) are designed in an arc shape.

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